are these concrete seats with no backs?

Garage door supplier

2419 Griffith Ave, Los Angeles, CA 90011, USA

American restaurant

6333 W 3rd St, Los Angeles, CA 90036, USA

Chicken restaurant

2005 Westwood Blvd, Los Angeles, CA 90025, USA

Mexican restaurant

1621 W 6th St, Los Angeles, CA 90017, USA

American restaurant

2927 N Broadway, Los Angeles, CA 90031, USA

Pet store

5861 S Vermont Ave, Los Angeles, CA 90044, USA

Pet store

3536 E Cesar E Chavez Ave, Los Angeles, CA 90063, USA

Persian restaurant

1269 Westwood Blvd, Los Angeles, CA 90024, USA